in arch/powerpc/cpu/mpc83xx/speed.c [79:477]
int get_clocks(void)
{
volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
u32 pci_sync_in;
u8 spmf;
u8 clkin_div;
u32 sccr;
u32 corecnf_tab_index;
u8 corepll;
u32 lcrr;
u32 csb_clk;
#if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X) || \
defined(CONFIG_ARCH_MPC834X) || defined(CONFIG_ARCH_MPC837X)
u32 tsec1_clk;
u32 tsec2_clk;
u32 usbdr_clk;
#elif defined(CONFIG_ARCH_MPC8309)
u32 usbdr_clk;
#endif
#ifdef CONFIG_ARCH_MPC834X
u32 usbmph_clk;
#endif
u32 core_clk;
u32 i2c1_clk;
#if !defined(CONFIG_ARCH_MPC832X)
u32 i2c2_clk;
#endif
#if defined(CONFIG_FSL_ESDHC)
u32 sdhc_clk;
#endif
#if !defined(CONFIG_ARCH_MPC8309)
u32 enc_clk;
#endif
u32 lbiu_clk;
u32 lclk_clk;
u32 mem_clk;
#if defined(CONFIG_ARCH_MPC8360)
u32 mem_sec_clk;
#endif
#if defined(CONFIG_QE)
u32 qepmf;
u32 qepdf;
u32 qe_clk;
u32 brg_clk;
#endif
#if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X) || \
defined(CONFIG_ARCH_MPC837X)
u32 pciexp1_clk;
u32 pciexp2_clk;
#endif
#if defined(CONFIG_ARCH_MPC837X)
u32 sata_clk;
#endif
if ((im->sysconf.immrbar & IMMRBAR_BASE_ADDR) != (u32) im)
return -1;
clkin_div = ((im->clk.spmr & SPMR_CKID) >> SPMR_CKID_SHIFT);
if (im->reset.rcwh & HRCWH_PCI_HOST) {
#if defined(CONFIG_SYS_CLK_FREQ)
pci_sync_in = CONFIG_SYS_CLK_FREQ / (1 + clkin_div);
#else
pci_sync_in = 0xDEADBEEF;
#endif
} else {
#if defined(CONFIG_83XX_PCICLK)
pci_sync_in = CONFIG_83XX_PCICLK;
#else
pci_sync_in = 0xDEADBEEF;
#endif
}
spmf = (im->clk.spmr & SPMR_SPMF) >> SPMR_SPMF_SHIFT;
csb_clk = pci_sync_in * (1 + clkin_div) * spmf;
sccr = im->clk.sccr;
#if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X) || \
defined(CONFIG_ARCH_MPC834X) || defined(CONFIG_ARCH_MPC837X)
switch ((sccr & SCCR_TSEC1CM) >> SCCR_TSEC1CM_SHIFT) {
case 0:
tsec1_clk = 0;
break;
case 1:
tsec1_clk = csb_clk;
break;
case 2:
tsec1_clk = csb_clk / 2;
break;
case 3:
tsec1_clk = csb_clk / 3;
break;
default:
/* unknown SCCR_TSEC1CM value */
return -2;
}
#endif
#if defined(CONFIG_ARCH_MPC830X) || defined(CONFIG_ARCH_MPC831X) || \
defined(CONFIG_ARCH_MPC834X) || defined(CONFIG_ARCH_MPC837X)
switch ((sccr & SCCR_USBDRCM) >> SCCR_USBDRCM_SHIFT) {
case 0:
usbdr_clk = 0;
break;
case 1:
usbdr_clk = csb_clk;
break;
case 2:
usbdr_clk = csb_clk / 2;
break;
case 3:
usbdr_clk = csb_clk / 3;
break;
default:
/* unknown SCCR_USBDRCM value */
return -3;
}
#endif
#if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC834X) || \
defined(CONFIG_ARCH_MPC837X)
switch ((sccr & SCCR_TSEC2CM) >> SCCR_TSEC2CM_SHIFT) {
case 0:
tsec2_clk = 0;
break;
case 1:
tsec2_clk = csb_clk;
break;
case 2:
tsec2_clk = csb_clk / 2;
break;
case 3:
tsec2_clk = csb_clk / 3;
break;
default:
/* unknown SCCR_TSEC2CM value */
return -4;
}
#elif defined(CONFIG_ARCH_MPC8313)
tsec2_clk = tsec1_clk;
if (!(sccr & SCCR_TSEC1ON))
tsec1_clk = 0;
if (!(sccr & SCCR_TSEC2ON))
tsec2_clk = 0;
#endif
#if defined(CONFIG_ARCH_MPC834X)
switch ((sccr & SCCR_USBMPHCM) >> SCCR_USBMPHCM_SHIFT) {
case 0:
usbmph_clk = 0;
break;
case 1:
usbmph_clk = csb_clk;
break;
case 2:
usbmph_clk = csb_clk / 2;
break;
case 3:
usbmph_clk = csb_clk / 3;
break;
default:
/* unknown SCCR_USBMPHCM value */
return -5;
}
if (usbmph_clk != 0 && usbdr_clk != 0 && usbmph_clk != usbdr_clk) {
/* if USB MPH clock is not disabled and
* USB DR clock is not disabled then
* USB MPH & USB DR must have the same rate
*/
return -6;
}
#endif
#if !defined(CONFIG_ARCH_MPC8309)
switch ((sccr & SCCR_ENCCM) >> SCCR_ENCCM_SHIFT) {
case 0:
enc_clk = 0;
break;
case 1:
enc_clk = csb_clk;
break;
case 2:
enc_clk = csb_clk / 2;
break;
case 3:
enc_clk = csb_clk / 3;
break;
default:
/* unknown SCCR_ENCCM value */
return -7;
}
#endif
#if defined(CONFIG_FSL_ESDHC)
switch ((sccr & SCCR_SDHCCM) >> SCCR_SDHCCM_SHIFT) {
case 0:
sdhc_clk = 0;
break;
case 1:
sdhc_clk = csb_clk;
break;
case 2:
sdhc_clk = csb_clk / 2;
break;
case 3:
sdhc_clk = csb_clk / 3;
break;
default:
/* unknown SCCR_SDHCCM value */
return -8;
}
#endif
#if defined(CONFIG_ARCH_MPC834X)
i2c1_clk = tsec2_clk;
#elif defined(CONFIG_ARCH_MPC8360)
i2c1_clk = csb_clk;
#elif defined(CONFIG_ARCH_MPC832X)
i2c1_clk = enc_clk;
#elif defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X)
i2c1_clk = enc_clk;
#elif defined(CONFIG_FSL_ESDHC)
i2c1_clk = sdhc_clk;
#elif defined(CONFIG_ARCH_MPC837X)
i2c1_clk = enc_clk;
#elif defined(CONFIG_ARCH_MPC8309)
i2c1_clk = csb_clk;
#endif
#if !defined(CONFIG_ARCH_MPC832X)
i2c2_clk = csb_clk; /* i2c-2 clk is equal to csb clk */
#endif
#if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X) || \
defined(CONFIG_ARCH_MPC837X)
switch ((sccr & SCCR_PCIEXP1CM) >> SCCR_PCIEXP1CM_SHIFT) {
case 0:
pciexp1_clk = 0;
break;
case 1:
pciexp1_clk = csb_clk;
break;
case 2:
pciexp1_clk = csb_clk / 2;
break;
case 3:
pciexp1_clk = csb_clk / 3;
break;
default:
/* unknown SCCR_PCIEXP1CM value */
return -9;
}
switch ((sccr & SCCR_PCIEXP2CM) >> SCCR_PCIEXP2CM_SHIFT) {
case 0:
pciexp2_clk = 0;
break;
case 1:
pciexp2_clk = csb_clk;
break;
case 2:
pciexp2_clk = csb_clk / 2;
break;
case 3:
pciexp2_clk = csb_clk / 3;
break;
default:
/* unknown SCCR_PCIEXP2CM value */
return -10;
}
#endif
#if defined(CONFIG_ARCH_MPC837X)
switch ((sccr & SCCR_SATA1CM) >> SCCR_SATA1CM_SHIFT) {
case 0:
sata_clk = 0;
break;
case 1:
sata_clk = csb_clk;
break;
case 2:
sata_clk = csb_clk / 2;
break;
case 3:
sata_clk = csb_clk / 3;
break;
default:
/* unknown SCCR_SATA1CM value */
return -11;
}
#endif
lbiu_clk = csb_clk *
(1 + ((im->clk.spmr & SPMR_LBIUCM) >> SPMR_LBIUCM_SHIFT));
lcrr = (im->im_lbc.lcrr & LCRR_CLKDIV) >> LCRR_CLKDIV_SHIFT;
switch (lcrr) {
case 2:
case 4:
case 8:
lclk_clk = lbiu_clk / lcrr;
break;
default:
/* unknown lcrr */
return -12;
}
mem_clk = csb_clk *
(1 + ((im->clk.spmr & SPMR_DDRCM) >> SPMR_DDRCM_SHIFT));
corepll = (im->clk.spmr & SPMR_COREPLL) >> SPMR_COREPLL_SHIFT;
#if defined(CONFIG_ARCH_MPC8360)
mem_sec_clk = csb_clk * (1 +
((im->clk.spmr & SPMR_LBIUCM) >> SPMR_LBIUCM_SHIFT));
#endif
corecnf_tab_index = ((corepll & 0x1F) << 2) | ((corepll & 0x60) >> 5);
if (corecnf_tab_index > (ARRAY_SIZE(corecnf_tab))) {
/* corecnf_tab_index is too high, possibly wrong value */
return -11;
}
switch (corecnf_tab[corecnf_tab_index].core_csb_ratio) {
case _byp:
case _x1:
case _1x:
core_clk = csb_clk;
break;
case _1_5x:
core_clk = (3 * csb_clk) / 2;
break;
case _2x:
core_clk = 2 * csb_clk;
break;
case _2_5x:
core_clk = (5 * csb_clk) / 2;
break;
case _3x:
core_clk = 3 * csb_clk;
break;
default:
/* unknown core to csb ratio */
return -13;
}
#if defined(CONFIG_QE)
qepmf = (im->clk.spmr & SPMR_CEPMF) >> SPMR_CEPMF_SHIFT;
qepdf = (im->clk.spmr & SPMR_CEPDF) >> SPMR_CEPDF_SHIFT;
qe_clk = (pci_sync_in * qepmf) / (1 + qepdf);
brg_clk = qe_clk / 2;
#endif
gd->arch.csb_clk = csb_clk;
#if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X) || \
defined(CONFIG_ARCH_MPC834X) || defined(CONFIG_ARCH_MPC837X)
gd->arch.tsec1_clk = tsec1_clk;
gd->arch.tsec2_clk = tsec2_clk;
gd->arch.usbdr_clk = usbdr_clk;
#elif defined(CONFIG_ARCH_MPC8309)
gd->arch.usbdr_clk = usbdr_clk;
#endif
#if defined(CONFIG_ARCH_MPC834X)
gd->arch.usbmph_clk = usbmph_clk;
#endif
#if defined(CONFIG_FSL_ESDHC)
gd->arch.sdhc_clk = sdhc_clk;
#endif
gd->arch.core_clk = core_clk;
gd->arch.i2c1_clk = i2c1_clk;
#if !defined(CONFIG_ARCH_MPC832X)
gd->arch.i2c2_clk = i2c2_clk;
#endif
#if !defined(CONFIG_ARCH_MPC8309)
gd->arch.enc_clk = enc_clk;
#endif
gd->arch.lbiu_clk = lbiu_clk;
gd->arch.lclk_clk = lclk_clk;
gd->mem_clk = mem_clk;
#if defined(CONFIG_ARCH_MPC8360)
gd->arch.mem_sec_clk = mem_sec_clk;
#endif
#if defined(CONFIG_QE)
gd->arch.qe_clk = qe_clk;
gd->arch.brg_clk = brg_clk;
#endif
#if defined(CONFIG_ARCH_MPC8308) || defined(CONFIG_ARCH_MPC831X) || \
defined(CONFIG_ARCH_MPC837X)
gd->arch.pciexp1_clk = pciexp1_clk;
gd->arch.pciexp2_clk = pciexp2_clk;
#endif
#if defined(CONFIG_ARCH_MPC837X)
gd->arch.sata_clk = sata_clk;
#endif
gd->pci_clk = pci_sync_in;
gd->cpu_clk = gd->arch.core_clk;
gd->bus_clk = gd->arch.csb_clk;
return 0;
}